贵阳小关大桥主桥设计要点  

Design Summary of Main Girder of Xiaoguang Long Highway Bridge in Guiyang City

作　　者：徐占军[1] 盛兴旺[1] 刘志军 

机构地区：[1]中南大学土木建筑学院,长沙市410075 [2]铁道第二设计院贵阳院,贵阳市550002

出　　处：《公路》2003年第8期90-95,共6页Highway

摘　　要：贵阳市中心环线小关公路特大桥主桥采用大跨径连续刚构桥型 ,跨径为 (6 9m+12 5 m+16 0 m+16 0 m+112 m) ,最高桥墩墩高为 10 0 m,该结构具有联长、跨径大、桥墩高、边中跨比值大和主跨不对称等特点。介绍该主桥的总体布置、结构尺寸、施工方案、结构静力行为特点、结合部位的空间有限元分析、结构设计要点及技术处理措施等。为克服不对称带来的变形大的特征 。Xiaoguang Extra long Bridge on highway surrounding the center of Guiyang City is a prestressed concrete continuous rigid frame bridge with main spans (69+125+160+160+112)m, and its highest pier reaches 100 m. It has particular features such as long unit, long span, high piers, great span ratio of side to center and asymmetric main spans. In this paper, general arrangement and structure, construction scheme, stress and strain of main span when no load is on as well as the structural analysis of conjoint part with spatial finite element method are given. The main points to be noticed in the process of design and the measures adopted are introduced. In order to prevent big displacement from asymmetry, a distinguished construction technique with which a jacking force is loaded on the middle span before closure is presented.

关 键 词：大跨径连续刚构 高墩 顶推合拢施工 桥梁设计 桥型布置 结构特点 贵阳小关大桥 主桥设计 公路桥 

分 类 号：U442.5[建筑科学—桥梁与隧道工程] U448.14[交通运输工程—道路与铁道工程]